Power lift for groundworking implements



Aug. 19, I924.

' H. W. THAYER POWER LIFT FOR GROUNDWORKING IMPLIEMENTS Filed Feb; 16, 1922 [WMEW far 5 /74 TYER release tag. i, res..-

"' RY W. THAYER, 01'! L03 ANGELES, CALEORNIA, SIGNOR TO THE r CALIFORN MANUFACTURING COMEY, 01? LOS ANGELES, CALIFQ A EKQMTION 03 LIFT FOR GRUUWDWOREING IEZPL To all whom it may concern:

Be it known that I, HARRY W. THAYER, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Power Lift for Groundworking Implements, of which the following is a specification.

This invention relates to mechanism for raising and lowering ground-working tools such as lows, chisels and the like, the turning of t e ground wheels generating power for lifting the plows or other tools out of the ground, when it is desired to discontinue the plowing or other operation efi'ected by the tools.

This invention is an improvement on the copending application of D. M. Wetter-s filed November 15th, 1920, Serial No. 424,- 083, and an object of the invention is to prevent accidental release or? the link by jarring of the implement in operation.

' The accompanying drawings illustrate the invention:

Fig. 1 is a side elevation of an implement embodyin the invention, the frame and the parts carried thereby being shown in solid lines in position for plowing, and being shown in broken lines in elevated position.

Fig. 2 is an enlarged elevation, partly in section, of a fraent of the implement shown in Fig. 1, the frame and its parts being in raised osition. Broken lines indicate the position of the link when the frame is in lowered position.

i Fig. 3 is an enlarged detail or the latch mechanism showing the link latched in position to hold the frame in lifted position.

Fl 4: is a detail similar to Fig. 3 except ing-t at the parts are shown in the link roleasing positlon, broken lines indicating the position of the link correspondigg to the position shown in broken lines in 1g. 2.

' Fig. 5 is a plan view of Fl 8.

Fig. 6 is an elevation, part y in section, from the line indicated by 6-6, Fig. 3.

Fig. 7 is an enlarged fraental e ovation,

artly in section, from the line indica by 2 7, Fig. 1.

A ire of any suitable'eonetruction is indicated at 7 and the ground-working tools are supported on the frame. e tools shown in this instance are sub-soil points 8 which are connected to the ire h 2 standards 9. e h" is providwl 10 in which is journaled a cra axle n.

The apposite ends of the axle llare supports on ground wheels 12. y one of the points 8, standards 9, bearings 10 and ground wheels 12 can be seen because of the nature of the views. The hubs 13 of the ground wheels constitute un which the axle 11 turns, the crank arms of the axle being indicated at 1%.

Mounted on the axle portions that are concentric with one of the hubs 13 is a toothed or ratchet wheel 15, this wheel together with the parts to be now described, are rovided in duplicate, one set on each side 0 the implement. Inasmuch as both sets are alike, but one will be described herein and, though but one set could be used, it is preferred to employ the two sets. The wheel 15 is pro: vided with teeth 16 and is suitably fastened to the hub 13. Any one of these teeth is adapted to be selectivel en ed bye detent- 17 provided on one end of a lever 18 which is fulcrumed at 19 on a clamp 20 mounted on the crank arm 14,

The opposite end or the lever 18 is connected with the complementa lever, not shown, on the opposite side the implement by a cross member 21, which consti-- tutes an abutment adapted, when the crank is in lowered position, to be engaged b the curved end 22 of a lever 23. Only one ever 23 and one each of the arts now to bescribed are provided. T a lever 23 is pivotally mounted at 2t on a standard 25 seported on longitudinal bars 26, 27 of htrame 1. The forward portion of the lever 23 is adapted to rest upon a shoulder 28 of a standard 29 mounted on the bar 27. 'lhe standard 29 is rovided with a vertical slot 30 to permit lever to he lowered when it is disengaged from the shoulder 28. a

tion and the forward end of the lever 23 is depressed, the lower end 22 is moved rearwardly against the abuent 21, and further depron of said lever 11- ivot 19 to moe its detent th rotation at e teeth 1.

on the era 14 are in lowered posiupper end of the standard ..1 uently swings When the wheels 12 are travelling over the ound the toothed wheels 15 of course rotate and, if the 'detent 17 be engaged by the tion for lowerm toothed wheel 15, the lever 18 will be raised to the'position shown'in Figure 2. Since the lever 18 is pivotallyconnected with the crank arm 14 of the axle, this movement of said lever of course swings the crank arm u Ward and consequently hoists the rear end 0? the frame 1, together with whatever tools are mounted on or attached to the rear portion of said frame. The movement is sufficient to cause the .tools to leave the earth.

The lever 18 is yieldingly held with its detent 17 out of engagement with the notched wheel 15 by aspring33. There is a spring at each side of the implement and the elements now to be described are also provided in duplicate at opposite sides. The

detent 17 is limited in its movement away from the path of rotation of the teeth 16 by a stop 34 formed on the lever 18 and adapted to engage the clamp 20, when the parts are in position to permit the frame to assume the lowered position shown in full lines in Fig ure 1.

When the lever 18 has been raised to the position shown in Figure 2, the abutment 21 engages an abutment 52 secured to the frame 1. When this occurs further forward movement of the lever 18. causes the abutment 52 to depress the member 21 relative to the detent 11 which, accordingly, is thereupon withdrawn from engagement with the tooth 16, thus placing the lever 18 in posias in Figure 2; though such lowering wi 1 not naturally occur until the operator wills it, since meansare provided for preventing, until desired, the return of the axle to its former position as will be described hereinafter.

The crank of the axle is provided with a single fixed arm 35 which is pivoted at 36 to a link 37 that is notched at 38 to form a shoulder 39. The link 37 passes through the standard 25 and rests upon the pivot 24 and is given endwise motion relative to said pivot by turning of the axle, as hereinbefore described, so that when the lever 18 is in the position indicated in Fig. 2, the notch 38 will be in position to receive the pivot 24.

At the time that the abutment 21 strikes the stop 52, or a moment before, the shoulder 39 has advanced sufficiently to drop in front of the stop 24. In consequence of this, as soon as the detent 17 is retracted from engagement with the toothed wheel 15, the

shoulder 39 will engage the pivot 24 which thus constitutes a stop to hold the link 37 in the position shown in Figures 2 and 3, to thereby prevent the crank and rear end of the frame from lowering after disengagement of the detent 17 from the toothed wheel. i

In the application hereinbefore mentioned, an abutment was provided on the lever 23 for engaging the link 37, upon upward movement of said lever, to release the link 37 from the stop 24 to permit the frame to lower. Accidental striking upwardly by the operator of the'lever 23, or j olting of the implement over rough ground, would cause accidental release of the link '37 and, therefore, instead of employing such construction, I have provided diiferent means for releasing the link and such means are the essence of the invention and will now be described. Pivoted at 40 to the upper end of the standard 25 is a bell-crank lever 41 to which is pivoted at 42 one end of a link 43. The other end of the link 43 is pivoted at 44 to the lower portion of a slide 45 which is shiftably mounted on the standard 25 by the stop 24 and pivot 40 that pass respectively through slots 46, 47 extending lengthwise of theslide 45. p

The slide 45 is provided with a shoulder 48 adapted to engage the under face of the link 37 to displace said link from engagement with the stop--24 when the lever 41 is swung rearwardly to the position shown in Figure 4. When the lever 41 is in its forward position, as in Figure 3, another shoulder 49 on the slide 45 engages the upper face of the link 37, and in this position of the lever 41, as will be seen in Figure 3, the pivot 42 of the link 43 is positioned between the stop 24 and a line connecting the pivots 40 and 44 so that, when upward pressure upon the link 37 or vibration of the parts as the implement operates tends to disengage the link 37 from the stop 24, the link 43 will thrust against the stop 24, as in Fig. 3, and prevent raising of the slide 45. Thus the link 37 is latched in position for holding the frame lifted, and it requires the operator to swing the lever 41 from the osition shown in Figure 3 to the position s own in Figure 4 in order to effect release and lifting of the link 37 to permit the frame to lower. A suitable operating line, not shown, may be connected with the upper end of the lever 41 to o erate said lever, and for this purpose the ever 41 is perforated as indicated at 50.

When the frame is thus lowered by releasing action of the lever 41, the tools attached to the frame will enter the earth as limit the rearward movement of said link so as to restrict the depth to which the tools 8 will penetrate the earth, and there is provided for this urpose a stop 51 on the for- 5 ward end of t e l1nk 37 adapted to engage the standard 25 when the frame drops. The sto 51 shown in the drawings is adjustable an may be of the construction fully de scribed in the above mentioned copending application. The detailed construction of the stop 51 is not a part of the present invention and, therefore, it need '-not be further described herein.

' I claim:

1. In an implement, the combination of a frame, a crank axle su porting the frame, ground wheels journale on the axle, means to connect the crank at will to one of the wheels to turn the crank, a member to throw the connecting means into operation, means operating when the crank is turned to a predetermined position to throw the connecting means out of operation, means to hold the crank in the predetermined osition, and means to release the crank-hol 'ng means to permit the crank to be turned in the reverse Y direction, said means including a shiftably mounted slide, a pivoted lever, and a link ivotally connected to the slide and to the ever t 2. in an implement, the combination of a frame, ground wheels, an o crating member,

means 9 erating to raise t e frame relative to the w eels whenthe operating member is in one position, means operated by raising of the frame to disconnect the me raisin means, means tohold ,the frame in the raise position when the frame-raising means is I cluding a stop and a'link having a shoulder to engage the stop, a shiftably mounted slide having a shoulder to engage the link to release 1t from the stop and having a. second shoulder to en age the tohold the link with the shoul er against the stop, a pivoted lever, and a second link pivoted to the lever and to the slide, the ivot that connects the lever and'second 1i being positioned between the stop and a line connectin the other pivots when the second shoulder 15 appil'lrjufimately in engagement with the first 3. In an implement, the combination of a frame, a crank 'axle supporting the frame, ground wheels supportlng theaxle, means to connect the axle at will to one of the wheels toturn said axle to-raise the frame,

a manuallyloperated member to throw the connecting means into operation, means operating when the crank is turned to a predetermined position to throw the connecting means out of operation, means to hold the crank in the predetermined position, said means including a shiftably mounted member having a shoulder and a stationary Gnonen Hume,-

L. BELLE Wmvmz. 

